#timeline-viz {
  border-top: thin solid black;
  margin-top: 1em;
  padding-top: 1em;
}

#timeline-viz .axis path,
#timeline-viz .axis line {
  fill: none;
  stroke: #000;
  shape-rendering: crispEdges;
}

#timeline-viz .axis text {
  font: 10px sans-serif;
}

.d3-tip {
  font-family: Helvetica;
  font-size: 12px;
  line-height: 1;
  font-weight: bold;
  padding: 4px 6px;
  background: rgba(0, 0, 0, 0.8);
  color: #fff;
  border-radius: 2px;
}